structural elements, but they compromise the drug‐likeness of numerous biologically active compounds, including ligands of G‐protein‐coupled receptors (GPCRs). As part of a project focused on the search for guanidine bioisosteres, argininamide‐type neuropeptide Y (NPY) Y2 receptor (Y2R) antagonists related to BIIE0246 were synthesized. Starting from ornithine derivatives, NG‐acylated argininamides were obtained
诸如
胍基等强碱性基团是至关重要的结构元素,但它们会损害许多
生物活性化合物的药物样,包括G蛋白偶联受体(
GPCR)的
配体。作为致力于寻找
胍类
生物等位
基因的项目的一部分,合成了与BIIE0246相关的精
氨酸酰胺型神经肽Y(NPY)Y 2受体(Y 2 R)拮抗剂。从
鸟氨酸衍
生物开始,N ģ -acylated argininamides通过
胍基化量身定做的单-Boc保护的得到Ñ -acyl-小号-methylisothioureas。研究了这些化合物的Y 2 R拮抗作用(
钙测定),Y 2R亲和力和NPY受体亚型选择性(流式细胞术结合测定)。大多数N G取代的(S)-精
氨酰胺显示出与母体化合物相似的Y 2 R拮抗活性和结合亲和力,而带有末端胺的N G酰化或
氨基甲酰化类似物则更为出色(Y 2 R:K i和K B值在低纳摩尔范围内)。这表明化合物的碱性虽然比
胍的碱度低4-5个数量级,但足以与Y 2的酸性
氨基酸形成关键相互作用R